Supermicro X12 Secure Boot Configuration Instructions page 13

Secure Boot Settings
Export Secure Boot Variables
Use this feature to export the Secure Boot values to the files in a root folder that resides
in a file system device.
Enroll Efi Image
This feature enrolls SHA256 hash binary data in the Authorized Signature Database (DB)
and allows the image to run in Secure Boot mode.
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